/**
 * Copyright (c) 2011-2023, James Zhan 詹波 (jfinal@126.com).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.jfinal.template.io;

import java.io.IOException;
import java.io.OutputStream;

/**
 * ByteWriter
 */
public class ByteWriter extends Writer {

    OutputStream out;
    Encoder encoder;

    char[] chars;
    byte[] bytes;

    boolean inUse;	// 支持 reentrant

    public ByteWriter(Encoder encoder, int bufferSize) {
        this.encoder = encoder;
        this.chars = new char[bufferSize];
        this.bytes = new byte[bufferSize * ((int)encoder.maxBytesPerChar())];
    }

    public ByteWriter init(OutputStream outputStream) {
        inUse = true;
        this.out = outputStream;
        return this;
    }

    public void close() {
        inUse = false;
        out = null;
    }

    public boolean isInUse() {
        return inUse;
    }

    public void flush() throws IOException {
        out.flush();
    }

    public void write(String str, int offset, int len) throws IOException {
        int size, byteLen;
        while (len > 0) {
            size = (len > chars.length ? chars.length : len);

            str.getChars(offset, offset + size, chars, 0);
            byteLen = encoder.encode(chars, 0, size, bytes);
            out.write(bytes, 0, byteLen);

            offset += size;
            len -= size;
        }
    }

    public void write(String str) throws IOException {
        write(str, 0, str.length());
    }

    public void write(StringBuilder stringBuilder, int offset, int len) throws IOException {
        int size, byteLen;
        while (len > 0) {
            size = (len > chars.length ? chars.length : len);

            stringBuilder.getChars(offset, offset + size, chars, 0);
            byteLen = encoder.encode(chars, 0, size, bytes);
            out.write(bytes, 0, byteLen);

            offset += size;
            len -= size;
        }
    }

    public void write(StringBuilder stringBuilder) throws IOException {
        write(stringBuilder, 0, stringBuilder.length());
    }

    public void write(IWritable writable) throws IOException {
        byte[] data = writable.getBytes();
        out.write(data, 0, data.length);
    }

    public void write(int intValue) throws IOException {
        IntegerWriter.write(this, intValue);
    }

    public void write(long longValue) throws IOException {
        LongWriter.write(this, longValue);
    }

    public void write(double doubleValue) throws IOException {
        FloatingWriter.write(this, doubleValue);
    }

    public void write(float floatValue) throws IOException {
        FloatingWriter.write(this, floatValue);
    }

    private static final byte[] TRUE_BYTES = "true".getBytes();
    private static final byte[] FALSE_BYTES = "false".getBytes();

    public void write(boolean booleanValue) throws IOException {
        out.write(booleanValue ? TRUE_BYTES : FALSE_BYTES);
    }
}



